From 2828680e39e843514a38781878e2a3534f876233 Mon Sep 17 00:00:00 2001 From: Connor Abbott Date: Fri, 5 Sep 2014 20:59:32 -0400 Subject: [PATCH] ra: assert against unsigned underflow in q_total q_total should never go below 0 (which is why it's defined as unsigned), and if it does, then something is seriously wrong. Signed-off-by: Connor Abbott Reviewed-by: Kenneth Graunke --- src/mesa/program/register_allocate.c | 1 + 1 file changed, 1 insertion(+) diff --git a/src/mesa/program/register_allocate.c b/src/mesa/program/register_allocate.c index db2be5dfad4..7faf67215c8 100644 --- a/src/mesa/program/register_allocate.c +++ b/src/mesa/program/register_allocate.c @@ -434,6 +434,7 @@ decrement_q(struct ra_graph *g, unsigned int n) unsigned int n2_class = g->nodes[n2].class; if (n != n2 && !g->nodes[n2].in_stack) { + assert(g->nodes[n2].q_total >= g->regs->classes[n2_class]->q[n_class]); g->nodes[n2].q_total -= g->regs->classes[n2_class]->q[n_class]; } } -- 2.30.2